LM5176

現行

55V 大範圍 VIN 同步降 4 開關降壓升壓控制器

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同,但引腳輸出與所比較的裝置不同
最新 LM51772 現行 具 I2C 介面的 55-V 大範圍 VIN 四開關降壓升壓控制器 With I2C and higher efficiency

產品詳細資料

Vin (min) (V) 4.2 Vin (max) (V) 55 Operating temperature range (°C) -40 to 125 Topology Buck-Boost Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 55 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 2000 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable
Vin (min) (V) 4.2 Vin (max) (V) 55 Operating temperature range (°C) -40 to 125 Topology Buck-Boost Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 55 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 2000 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4 VQFN (RHF) 28 20 mm² 5 x 4
  • Functional Safety-Capable
  • Single inductor buck-boost controller for step-up/step-down DC/DC conversion
  • Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V maximum)
  • Flexible VOUT: 0.8 V to 55 V
  • VOUT short protection
  • High efficiency buck-boost transition
  • Adjustable switching frequency
  • Optional frequency sync and dithering
  • Integrated 2-A MOSFET gate drivers
  • Cycle-by-cycle current limit and optional hiccup
  • Optional input or output average current limiting
  • Programmable input UVLO and soft start
  • Power Good and output overvoltage protection
  • Available in HTSSOP-28 and QFN-28 packages
  • Create a custom design using the LM5176 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Single inductor buck-boost controller for step-up/step-down DC/DC conversion
  • Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V maximum)
  • Flexible VOUT: 0.8 V to 55 V
  • VOUT short protection
  • High efficiency buck-boost transition
  • Adjustable switching frequency
  • Optional frequency sync and dithering
  • Integrated 2-A MOSFET gate drivers
  • Cycle-by-cycle current limit and optional hiccup
  • Optional input or output average current limiting
  • Programmable input UVLO and soft start
  • Power Good and output overvoltage protection
  • Available in HTSSOP-28 and QFN-28 packages
  • Create a custom design using the LM5176 with the WEBENCH Power Designer

The LM5176 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM5176 operates over a wide input voltage range of 4.2 V to 55 V (60-V absolute maximum) to support a variety of applications.

The LM5176 uses current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.

The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM5176 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.

The LM5176 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM5176 operates over a wide input voltage range of 4.2 V to 55 V (60-V absolute maximum) to support a variety of applications.

The LM5176 uses current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.

The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM5176 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.

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技術文件

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類型 標題 日期
* Data sheet LM5176 55-V Wide VIN Synchronous 4-switch Buck-boost Controller datasheet (Rev. D) PDF | HTML 2021年 8月 10日
Application note Bidirectional TEC Driver Design for 40-W TEC PDF | HTML 2023年 6月 2日
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021年 4月 21日
Functional safety information LM5176 and LM5176-Q1 Functional Safety, FIT Rate, Failure FMD 2020年 5月 22日
Technical article Adjusting VOUT in USB Type-C™ and wireless charging applications, part 2 PDF | HTML 2020年 2月 18日
Technical article Adjusting VOUT in USB Type-C™ and wireless charging applications, part 1 PDF | HTML 2020年 2月 10日
Technical article Four-switch buck-boost layout tip No. 4: routing gate-drive and return paths PDF | HTML 2019年 2月 20日
Application note A Method to Improve LM5176 Overcurrent Protection Feature 2018年 8月 8日
Application note LM5176 Power Sharing Between Two Parallel, Four-Switch Buck-Boost Converters 2018年 7月 16日
White paper An overview of radiated EMI specifications for power supplies 2018年 6月 5日
White paper An overview of conducted EMI specifications for power supplies 2018年 2月 1日
EVM User's guide LM5176 Wide-VIN Buck-Boost Controller EVM 2017年 5月 2日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM5176EVM-HP — LM5176 寬輸入電壓降壓/升壓控制器評估模組

LM5176EVM-HP 展示使用 LM5176 wide-vin 降壓升壓控制器的靈活高功率降壓升壓設計。評估模組設定為在 6V 至 36V 輸入電壓範圍內運作,並提供最高 12A 負載電流的穩壓 12-V 輸出。
使用指南: PDF
TI.com 無法提供
模擬型號

LM5176 PSpice Transient Model (Rev. B)

SNVMBA4B.ZIP (147 KB) - PSpice Model
模擬型號

LM5176 PSpice Transient Model (Rev. C)

SNVMBA4C.ZIP (120 KB) - PSpice Model
計算工具

SNVC208 LM5176 Design Calculator

支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM34936-Q1 車用 30V 寬輸入電壓同步 4 開關降壓/升壓控制器 LM5176 55V 大範圍 VIN 同步降 4 開關降壓升壓控制器 LM5176-Q1 通過 AEC-Q100 驗證的 55V 寬輸入電壓同步 4 開關降壓/升壓控制器
參考設計

PMP22125 — 電池備援開關、充電器和監測器參考設計

A complete battery back-up, charger and monitoring is implemented with this reference design.  It includes switching between a 12/24-Vdc source and 12/24-V lead acid battery, constant current battery charging at 1A typical, battery maintenance float charge and monitoring circuits for the (...)
Test report: PDF
電路圖: PDF
參考設計

PMP21697 — 適用於汽用音訊放大器的可變電壓電源轉換器 5-35-V 300-W 峰值參考設計

This reference design provides a variable output power for audio amplifiers from 5 V to 35 V controllable by a Pulse Width Modulator signal. The output power capability of 75 W RMS and 300 W peak is suitable for high power automotive audio amplifiers. Conversion is 4-switch Buck-Boost for greater (...)
Test report: PDF
電路圖: PDF
參考設計

PMP30549 — 高效 32-V/3-A 同步 4 開關降壓-升壓參考設計

This telecom reference design features a highly effective 100-W, 4-switch buck-boost. The converter allows to drive a 32-V RF LDMOS out of a wide input range 17 V to 57 V with peak efficiency 98% plus. An input filter is implemented to reduce conducted emissions to source. Additionally, a spread (...)
Test report: PDF
電路圖: PDF
參考設計

PMP21278 — 適用於工業 PC 的 300W 12Vout 4 交換器降壓-升壓參考設計

The PMP21278 reference design is a 300W power supply utilizing the LM5176 4-switch buck-boost controller for industrial applications. This design can operate from 9V to 50V. The design has a 12V output and capable of sourcing 25A continuous current. Switching frequency is set to 230kHz. PMP21278 (...)
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 28 Ultra Librarian
VQFN (RHF) 28 Ultra Librarian

訂購與品質

內含資訊:
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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